We know that addition is the first hyperoperator, and
multiplication is the second. So, when there is a 2 as the
subscript, you multiply all of the numbers instead of adding. This
pattern continues will all natural numbers.

I have been working very hard on Unit 2. I have a great deal of
it done (about 1/2 complete). But, Unit 1 is the only part that is
complete and edited. Don't forget to contact me at
googologycourse@gmail.com if you notice any issues or any mistakes.
Thanks in advance!

It looks like the textbook for Googology I: Unit 1 should be
ready in less than a week. In less than a month. The Google Drive
folder for Unit 1 should be completely finalized. Time to start
editing! I'll post a link to a pdf version of the textbook. The
google drive folder can be found
here: https://drive.google.com/drive/folders/0ByPH8CN5V5jjY1hoTU9MeS1LTnc

Since it seems hard to understand what's going on in the
Googology Course, I am creating videos mimicking lessons for the
course. You can find them
here: https://www.youtube.com/channel/UCSAHUs38qCb1KRwRj5qK87Q

I'm adding about 1 per week. It should take a few months to do
everything for Googology I.